Does anyone use Quaker State Full synthetic oil?

There is a big box hardware type store that has the Quaker State "Enhanced Durability" Synthetic oil on sale for $4.00 a quart. Has or does anyone use quaker state? I have only used mobile 1, Royal Purple, and Fuchs brand oil. Should I steer clear of it?

I won't say don't use it, but I will just tell you two cases of what I've seen. My dad had a 70 road runner 440 6 pack, always ran Quaker State oil in from new. Well when the car had about 48,000 miles he did a complete rebuild on it, he pulled out handfulls of sludge out of the engine. He never used it again.

Someone on an HHR forum I'm on also complained about excessive sludge in the ecotec engine, pictures looked just like my dads old car. They said that Quaker State has Parafin Wax in it, I don't know if that's true though.

I don't use Quaker State anymore due to sludge found on Oil Filler cap
in an old car, years ago. It was not synthetic, and was about 10 years ago.
It never caused problems, but I do know it was the only oil I used that did
this of : Pennzoil, Mobil One, Castrol. Now, I use many different cheap brands
for the other 4 cars I change the oil on. Our new Crew gets Bulk GM oil
at the Dealership evrey 3 months whether it needs it or not. Brian

I have decided not to buy it. I have a few gallons of Fuchs 5-30 in the garage. GM is now using that instead of royal purple or mobile 1 for engine testing. They also put it in all the executive cars when they do oil changes at the tech center. I have heard of the paraffin wax thing in the past. I have never used Quaker state and now I will not due to the sludge reports that you guys mentioned.

If you have found Quaker State Enhanced Durability it is a syn blend. If it is their full synthetic blend it is Quaker State ULTIMATE Durability. This is NOT your 30 year old Quaker State. Quaker State is now owned by Shell Oil (Just like Pennzoil) The specs on QSUD are equal if not better than Mobil 1. QSUD is dexos approved. It meets the tough Honda HTO-06 turbo spec and Corvette GM 4718M spec. I would not have used anything 20 years ago with the Quaker State name on it, but times change. Do a little search over at bobistheoilguy.com. I think you'll find that QSUD is considered to be a super oil at a very good price.

I have decided not to buy it. I have a few gallons of Fuchs 5-30 in the garage. GM is now using that instead of royal purple or mobile 1 for engine testing. They also put it in all the executive cars when they do oil changes at the tech center. I have heard of the paraffin wax thing in the past. I have never used Quaker state and now I will not due to the sludge reports that you guys mentioned.

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Sludge reports were based on conventional oils (not synthetic). The Quaker State synthetic is in fact a superior (to conventional) product. That being said, nothing wrong with going with something with a little more trust, either!

Me, I've used it in the past, but found I just prefer to buy Mobil 1 on sale. I get it at less than $5/quart if I watch...